Holder for sharpening gravers or other tools.



l To allwhom "it ma@ concern:

` Tools; andfI do hereby declare the iollovi7- Uiviiiiiii STATES PATENT oiiiiicn.

Aia'riiiJ-.aA A. THOMAS, or' ELLrNvvoon, KANSAS.

Homann ronsnnnrnmive GRAvERs ony OTHER TOOLS.

Be itknown thatl, ARTHUR THOMAS, a

linivo-od, in the county of Barton-.and State ofKansas have invented aneiv and'useful lHolder for. Sharpening Gravers or other ing to be a full, clear, and exact description of-the invention, such as Will enable others make' and use the same.

y g ing and polishing, and particularly to a new' skilled in the artto which it appertains to Thisinvention'relates to the art of'grindfand 'useful device for holding gravers or other tools while being sharpened.

The invention aims' as its primary object to 'provide a device of this nature having @means Wliereby ay plurality of adjust-ments -ni'ay be obtained, in order that the graver or yother tool may be sharpened to the minutest ltangle.

A urther object ofthe invention is to prol 'vide means for presenting the graver or 'I other tool at various angles, 'relative to the grinding stones orpolishing buiing blocks.

o fA further obj ect is to provide a machine of lthis design, `whereby accuracy -is insured, and

one in which the use v.of Screwdrivers, pliers and'` the like-is eliminated, and substituted by other means in order to make the various 'by the yieldability and pressure may be ad.. justed from substantially nothing, 4to'full strength. l l

Another object of the invention vis to pro-4 videmeans .for holding andjlocking the varions adjustable parts securely, after being once adjusted.

'VA further object of the invention yis topprovide means for holding the device adjustable upon a jewelers lathe, "in -orderto be propferly operated by means of the counter-shaftf sures rapid and accurate grinding and` polhavebeen once adjusted, while accomplishing or performing other ivorln A further object ofthe invention 1s to con- -'struct such"V a devicethatvarious yparts may Specieation of Letters Patent. appneatio med iuiy s, 1912. serial N6. 707,537.

parts easier adjusted to the desired position.

Patented Dec. 10,1912.'

be renewed, and alsoA substantially instantly i l removable, for cleaning purposes. i f citizen of the United States, residing at El- A further object ofthe invent-ion isto provide means,lwherebythe shaft-of the grinding and polishing or buiiiiig members may be automatically lubricated.' l

Afurther object of theinvention provides means for 'holding the device steady and erect with relation tothe lathe. i f

Another object of the inveiitionis to provide such a device, whereby the graver may be ground across thelpoint, and not With or on line 3-3 of Fig. 1. i Fig. vt is a rear `elevation. Fig. o is a detail view of the arm 4a. Fig. '6 is `a detail viewof the buii'fer block 25. Fig. 7 is a detail View of -the'oil 0r sharpeningstone. Fig. 8 is a sectional view on' line 8-8 of Fig. 3. Fig.' 9 is anl enlai-ged detailsectional view. Fig. 1 is a detail view of the bushing bearing 31.2

Attention being directed more particularly to the accompanying drawings, 1 designates a jevvelers or Watch-makers lathe having the usual means 2 for clamping and supporting the same tov av bench-or the like. The lathe is provided With a guide groove 3 to receive a". member 4 correspondingly shaped. A thumb screw" 5 extends through a slot 'of thelathe, and is threaded into the l ymember 4:, for vholding the 'same in adjusted position. This member 4 is provided Witha tongue '7, Which'is adapted to entera correspondingly Shaped opening 8 in the base 9 vof the graver holder, in order to hold the -same steady and perfectly'erect. The base 9 is provided with a-pair ol lugs or pro-` jections` having beveled portions 'l0' to engage a beveled port-ion 11 of the member 4,

in order to insure the steadiness of the holder.' .These lugs or projections are .de-

noted by the nunierai 12.

. Thebase `of the holder jmergesinto the body 13", from the' upper portion'of which an arm 14 laterally projects, which terminates 1n a bearing l5 disposed at right "ari-v'. gles to thearm. The body 13 is provided with a vertical rectangular opening y16, into which a rack bar 17 extends. One side of tthe'body is provided with a pair of ears 18,' through which the shank 19 of .the thumb screw 2Q extends. -.This 'ank 19 is prof' ,v vided with a shoulder 21 'w iich contacts with bufling' wheel 25. Fitted on the extreme end.v

ofthe shank 19 beyond one of the ears is-a washer 26,' and extendingl transversely of the extremit pin 27, which v pxlxace, but alsoholds the shank in,` position. order to hold therack bar 17 in adjusted positions, a scrum-,28 :extends transversely of. -and isv threaded intol the body 13, so as to contact with the ,irack bar. This screw 28 is provided with a handle 29, which may be of any suitableshape or design, for ladjusting the screw. The rack bar 17 is provided jwith a plurality of graduations 30, with relation to which the rack bar 17 may be ad# 'ustedl In other words, the rack. barmay eadjusted a sixteenth of an inch, or any other infinitesimal fraction of 'an,inch, in order to attain the desired result'.

' Fitting neatly and snugly, but removable in the bearing y is a bushing bearing 31 oi any suitable material, which receives the shaft 32. This.bushingfbearing is designed in order lthat the shaft may'rotate true or accurate, and can be easily replaced when .'worn. Constructed rotatable with the shaft 32, byany suitable means, at 32a is an annular plate or table 33, throughwhich a hole or aperture 34 extends. This hole or aperture 34 registers with anv annular groove or recessl 35, 4which `is only deep enough to re-l ceive the shouldered end off the bushing bearing 31, sothat the shouldered/end will be exactly flush .with the upper end 36d of the bearing 15, in order that the table -33 will move freely against the upper surface of the shoulderedend 31h and the upper suricant from the annular groove or recess y of' said. shank- 19 is a cotter not only holds the washer in' to the shaft, so that the same may freely rotate. Secured to the lower end of the shaft `.by means'of a suitableset screw or other device 38 is a groove pulley 39, constructed of lany suitable material. A belt passes about the groove pulley, in order that a revoluble 'movement may be imparted to the shaft. This 'belt 39 may be connected to any suitable shafting (not -shown)which may be operated by any suitable source of power (not shown).

y The upper portion of the shaft 42 is re.4 4:stricted or Areduced in size and provided with threads 32, to which the table 33 is threaded. This reduced portiony passes through a carborundum wheel 24 or the sharpening stone 40, and to the upper extion of the shaft a winged nut 24b is thread-y ed to 4hold theearborundumwheel or sharpning stone against the table 33. The upper extreme threaded portion of the shaft is .denoted by the numeral 24a. A washer 24 Vis'interposed between the winged nut and th-\wheel 24 or stone 40. The carborundum 'wheel orsharpening stone may not only be applied, but other grindin or polishing or bu ng element` may be su 'stituted, for instance a polishing A block vof any suitable wood or other fiber, such as that shown at '41. '.This polishin or buling block saturated vwith oil and iamondtine or diamylene affords an ideal polishing or buling member.l Thesfegrinding, sharpening and polishing or buiing members may be of varlous sizes4 or dimensions. The oil or sharpening stone and polishing or buling block may be runat full speed, but it is to be remembered that great care must be exercised in using the carbor'undum wheel, for the reason that it will draw the temper of the graver or other y,tool ifrun at too great a speed. The sharpening or oil stone may be analogous to the India oil stone, or a stone obtained .from some parts of4 Arkansas. Y

The upper portion ofthe rack bar 17 terminates in alaterally extending portion 42, which is provided with a quadrant or sectorshaped member 43, which extends at right angles to the portion 42. This quadrant or sector-shaped member is provided upon its peripheral edge with a plurality of aduations 44, withrelationto any one o which the arched arm 44 (which arches over the segment or quadrant) may be adjusted. Threaded into the arched portion of the arm 44 is a thumb screw 45, which engages the segment or quadrant, in order to hold the arm in adjusted positions." This arm 44l is virregular in shape, andat oneend, termi, nates in a sleeve 46, through which and the ears 47 (which project `upwardly from the laterally extending portion 42) a pin 48 ex-` tends. Also pivotally mounted upon the pin 48, are the ears 49 of the base 50 of the collar ,treme portion'ofthe reduced threaded porp 51. This pin 4 8 is supplied with a head at the base 50 engages. The other end of the pin is supplied with a washer 52 and a cotter pin 53, in order to hold the pin in place. In this manner the base of the collar and the arm 44 are pivotally mounted upon the same point -or center, in order that the base 50 and -the collar may move independently of the arm, and vice versa. The base of the collar is provided with an aperture 53, of a diameter greater than a pin 5,4, which extends loosely therethrough.. The pin 54.,.at one end is provided with a head'55 and also extends through an opening of a lug 56 of a portion of the arm 44a, the head contacting with the lug, while the other end of the pin '54 is provided with a washer 57, and a Cotter pin 58, in order to hold the pin 54 in place. Surrounding the pin 54 between the lug of the arm and the base of the collar is a coil spring 60, which is placed under tension when the .graver 23 or other tool is in contact with any one of the grinding, sharpening or polishing or bufhng wheels. Owing vto the diameter of the opening in the base 50 of the collar being greater than the diameter of the pin 54, the base and the collar are allowed to moveindependent to the arm 44a, and with relation thereto, thereby allowing the graver or other tool 23a -to bearyieldably against one or another of the grinding, sharpening, or polishing or buhing wheels, it depending on-which one is used. This yieldable pressure may be regulated, by virtue of the thumb screw 45. In other words, by adjusting the arm 44a relative to the quadrant or segment, this yieldable pressure may be increased or decreased, as desired.

The collar 51 is split, as shown, and the split portions terminate in ears 62, into registering' openings of which a thumb screw 63 is threaded, whereby the collar may be tightened or loosened about the graver holder 64, so that the graver holder may be adjusted annularly with relation to the collar, so that the graver or other tool 23 may be provided .with a cutting edge of any suitable angle. In order to hold` the graver or other tool in adjusted positions within the holder, and with relation to the grinding, or sharpening or polishing wheel,

4in a direction toward and from the same, a

t-humb screw is threaded through the hub 64a of the holder tangentially, so as to engage the graver. This thumb screw is designated by the vcharacter 66. The graver holder is' in the form of a disk or the like, and its peripheral edge portion fits a groove 67 in the collar 51. The graver holder or disk is provided with a mark or indenture or cut 68, which :fu be disposed in registration with any one of the graduations 70 of the cpllar, in order that it be insured that the graver is held in the proper position to attain the desiredangle. The graduations of all theV parts, on which such graduations are necessary may be of any desired fractie s of anv inch. The bushing bearing may Ihe constructed of any suitable metal, such as speed metal.

From the foregoing it will be noted, there has been produced a graver or other-too1 holder, for holding a graver o r other toci While Abeing ground, sharpened, burnished,

or polished or buffed, and one in which the graver may be adj usted vertically with rela- -tion to a grinding, sharpening or buiiing wheel, and to and. from and at an angle thereto, as well as annularly, sothat the graver or other toolA may be applied with a cutting edge of anydesired angle, and furthermore, one in which a yieldable pressure is afforded between the graver or other tooi and the grinding, sharpening or-polishing element.

In the drawings, there has been disclosed a certain structure of device, -which in practical ields may require alterations, to which the patentee is entitled, provided the alterations are comprehended within the scope of what is claimed.

Bydevising a device. of this nature, which device has been found essential and desirable, the labor and 'work of a jeweler 0r watch-maker or other mechanics analogous thereto will be made easier and simplified.

The invention having been set forth, what is claimed as new and useful is 1. In a tool holder, a support having a revoluble mounted grinding or polishing Wheel, a tool holder proper, means for adjusting the same vertically, means for adjusting the holder annularly,and means for adjusting the tool .to and from the grinding or polishing wheel, and means for exercising yieldable pressure between the tool and the grinding or polishing wheel.

E2. In a tool'holder, a supporthaving an arm provide-d with a revoluble grinding member or the like, a tool holder, a tool adjustably secured therein, means for permitting the tool holder proper to be annularly adjusted, and means for exercising yieldable pressurebetween the tool vand the grinding member.

3. In combination, asupport, a rack adjustably secured therein, an annular member, means for pivoting the same to the upper portion of the rack, an arm pivoted to the pivotal means, and a yieldable connection between the pivoted member and the arm, and means for holding the arm in adjusted position.

4. In combination, a support, a rack-adjustably secured therein, an annular member, means for pivoting the same to the upper portion of the rack, an 'arm pivoted to the pivotal means, and a yieldable connection-between the pivoted member and the arm, and means 'for holding the arm in adjusted position, a tool holder proper ineluding a tool, the pivoted member having an annular groove to receive the tool holder 5 \proper, and means'for holding the annular member clamped about the tm helder proper.

5. In a device as set forth, a support, a,

rack adjustably secured therein, an annu- 10 lar member being split and provided With an 15 means for holdingthe arm in adjusted position thereby increasing or decreasing the yleldable pressure, a tool holder proper arranged in the groove of the annular member, a tool arranged in the holder proper, means for-holding the tool adjustable in the holder proper, the annular member having free ends constructed by the split, and means Connecting the free ends to clamp the annular member about the holder proper, the yieldable means acting to hold the tool yieldably in i lContact with a grinding or analogous member.

In testimony whereof I have signed my name to this specification in the presence of tivo subscribing Witnesses.

ARTHUR A. THOMAS.

Witnesses:

VINIE BooKEMonLE, GHAs. MELLIES. 

